About Cornerstone Solutions

We are proud to have you meet our core Cornerstone Team. We are working every day to improve our skill sets and widen the range of products that we support while working to better understand your needs for those products. Our memberships to multiple local BIA's help us keep up with all industry trends and build a better knowledge base for you.

Check out our white papers, written by the Cornerstone Solutions team, on our Resources page.

Leadership Team

Our leadership team founded HMS Cornerstone in 2009, combining years of industry experience. We work closely with our clients and related software vendors to provide premium service and stay at the forefront of the industries we serve.

Click here to go to our Industries page.

HMS Leadership

Kathleen Mortensen | Sr. Partner

Kathleen Mortensen has more than 30 years of experience in construction and job costing, including commercial construction, land development and homebuilding. Her prior experience includes director of operations for a developer, management in commercial construction, and land development. In addition, she has served as senior project manager for home builder software as well as IT Director. Kathy specializes in IT, project management and operations (both land development and builder), with a connective system view encompassing purchasing, site work/scheduling and sales through to final accounting.

Stuart Siegel | Sr. Partner

Stuart Siegel is a graduate from the E & Y Kenneth Leventhal school of hard knocks. He began his career as a real estate technology consultant in 1986. While at the firm, he specialized in homebuilding and property management systems. During his tenure, he has assisted clients in the design and deployment of technology based solutions, as well as business process and strategy development across most segments of the real estate industry. He has managed numerous consulting projects, including business process transformation, system assessment/selection, and workflow analysis and solution implementation. In 1998, he left the CPA world and accepted the position of Chief Information Officer at one of his homebuilding clients. He worked in private industry until 2002, and returned to the world of consulting as a co-founder of HMS Cornerstone Solutions.

HMS Team Members

John Hinken | Director. IT Services

John Hinken has an extensive operations and implementations background. He brings over 20 years of technology skills to the table as well. John’s prior industry experience includes accounting, real estate, construction and home building. He has also worked as a tech support specialist, application consultant and Senior Project Manager for a Homebuilding and Construction software company. John specializes in Purchasing, Operations, Information Technology, Data Management, Data Conversion, Systems Integration and Management Reporting.

Kelly Stanonik | Sr Developer / Report Writer / Data Conversion

Kelly Stanonik has 25 years of experience with database programming, including SQL Server since the 2000 version and Microsoft Office ERP integration since Office 95. He also has experience with JD Edwards, Microsoft NAV, and NewStar, and most recently has been working with integration and setup with Confluence, Jira and Zendesk as well as report building with Microsoft Report Builder 3.0.

Marcus Siu | Accounting / Data Analyst / IT Support

Marcus has over 20 years experience in the financial industry, leading off his career in Accounts Payable for Chevron Corporation where he transitioned into a Property Accountant working closely with PP&E (Fixed Assets) and supporting their real estate division. He has held positions such as A/P Supervisor, Senior Accountant and G/L Accountant, and is extremely proficient in the implementation of full-cycle and work flow processes to improve efficiency and strengthen controls. He has worked with several ‘High Tech’ manufacturing start-ups and is well versed in building all aspects of a financial SOX compliance program, including Purchasing, Billing, Collections, Accounts Payable and Accounts Receivable. Marcus is adept in both Excel and QuickBooks, bringing his extraordinary penchant for detail into every aspect of his work.

Amy McNeeley | Sr Developer / Report Writer / Data Conversion

Beginning her career in Accounting, Amy quickly discovered her passion for technology. She migrated to Information Technology through the management of an enterprise wide software implementation and there was no turning back. She followed this with almost a decade of consulting and support services for the world-wide Enterprise Resource Planning (ERP) Software Solutions company, Fourth Shift. These years working directly with customers honed Amy into a manufacturing software solutions expert, knowledge which she applied to her subsequent position as the Global SQL DBA for a multi-billion dollar manufacturing organization. Bitten by both SQL Server and .NET bugs Amy immediately began turning code into solutions; she spent the next six years concentrating her efforts on mastering custom software development. The wealth of knowledge and skill that Amy brings to each custom solution enables her customers to automate, optimize, and streamline processes, allowing them to excel at what they do best.

Kay Chamberlain | Security / Polices / CRM / Marketing

Kay holds both CISSP and CISA Certifications with 14+ years of IT Security experience and 10+ years of IT Audit experience. She has been documenting IT policies since 2002 and has published many articles on the topic. She has in depth knowledge of SOX, PCI, HIPAA and Privacy regulations and has built IT Audit programs from the ground up. She holds a Six Sigma Black Belt, and is Click Dimensions and Microsoft CRM certified (for configuration). She is a proud member of the HMS marketing team.

Carli Fuchs | Financial / Project Mgmt / Purchasing

Carli has over fifteen years of homebuilding and land development experience in the greater Sacramento Area. Her background includes key management and financial positions with Signature Properties and Lennar Homes. She specializes in project management for software implementations and business process solutions. In the course of her esteemed career, Carli has worked on multiple Community Facilities Districts (CFDs) in Northern California and continues to provide project consulting for the developers to ensure proper funding and accurate reporting between owners and the CFD Cities. Carli brings her strong financial background as well as extensive experience in full-cycle operations management to build valuable customer partnerships and successfully implement large scale solutions.

April Yamamoto | Consultant

Coming soon....

Kate Alger | BI Developer

Kate is our newest database specialist and has quickly gotten up to speed with the myriad of custom reports that Cornerstone supports/provides. Her current focus is in business analysis and report designing while assisting with the finer details of additional projects. She is excited to expand her knowledge into all the Cornerstone industries this year.


Software Experience


Cornerstone Solutions works extensively on a wide range of industry related software packages, and our years of experience can help you find the right fit for your business, whether you are choosing individual solutions or a combined software suite. Below is a list of some of our most frequently implemented and supported product solutions.

The Building Industry Association of Southern California (BIASC) aggressively pursues solutions to the many obstacles faced by the residential construction industry at any given time. With an average of 150 different professions involved with the construction of a single new home, support of the BIASC directly impacts a large portion of Southern California’s economy. The BIASC has been fighting for home ownership and striving to prevent unreasonable legislation from inhibiting construction related job creation for over 90 years.


Charlotte/DeSoto Building Industry Association (CDBIA) is a not-for-profit organization that believes home ownership should be within reach of every American. They believe that all homes and all buildings should be well-designed, well-constructed and located in attractive communities where educational, recreational, religious and shopping facilities are available to all. High standards of health, safety, and sanitation should be built into every home. CDBIA members encourage research within the building industry and give their informed and vigorous support to all sound legislative proposals affecting the industry. They are committed to establishing and maintaining the very highest standards in the country for the building industry.